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Medical Term:


Pronunciation: mak'ro-nu'kle-us


  1. A nucleus that occupies a relatively large portion of the cell, or the larger nucleus where two or more are present in a cell.
  2. The larger of the two nuclei in ciliates, which governs vegetative metabolic functions and not reproduction.

Synonym(s): meganucleus

See Also: micronucleus2

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